Knob-lock.



No- 842,834. PATENTED JAN. 29, 1907.

J. A. HURDLE.

KNOB LOOK.

APPLIOATION FILED MAY 29, 1906.

v INVENTOR JizZza/z .ziflizr'alle v A A; TTORN class in which the locking UNITED STATES PATENT OFFIOE...

JULIAN A. HURDLE, OF NEW YORK, N. Y., ASSIGNOR or ONE-HALF TO FEDERATION HARDWARE AND TOOL COMPANY, A CORPORATION F NEW YORK.

KNOB-LOCK.

Specification of Letters Patent.

' Patented Jan. 29, 1907.

Application filed May 29. 1906. Serial No. 319,288.

To all whom it may concern.-

Be it lmown that I, JULIAN A. HURDLE a citizen of the United States, residingatt e My invention relates to improvements inknoblocks, and more particularly to that mechanism is arranged in the spindle of t e knobs and operated by a key inserted in a keyhole in one of the knobs; and the object of my invention is to rovide a compact lock which cannot be pic ed and which may be attached to or connected with any mortise-lock having its knobs mounted on a connecting-spindle operating the latch.

My invention consists of a lock having a keyway arran ed within one of the knobs and a key-fol ower connectin sponding within the spindle of t e knobs and means for operating said key-follower.

In the drawings, Fi e 1 represents .my device assembled, part y in section, showin the manner in which the same is mounte u on the door. Fig. 2 is a detached detail view of the key-follower, carrier, or spindle, partly in section. Fig. 3 is an end view of the "same. Fig. 4 is an edge view of the ke follower, showing the swivel portion part y' in section. Fig. 5 is a detached plan view of the ke -follower. Fig. 6 is a transverse section ta en on line 6 6 of Fig. 1. Fig. 7 is a transversesection taken on line 7 7 of Fig. 1. Fig. 8 is a detached end view of the cylinder conta' the keyway. Fig. 9 represents the same ke ay-cylinder partly in section. Fig. 10 is a orizontal section taken on line 10 10 of Fig. 7. Fig. 11 is a separate view of a s iral key. Fig. 12 represents a lan view of the keyway-cyhnder in which is s a own two ward-holes.

Similar letters refer to similar parts throughout the several views.

My improved knob-lock is designed for use upon a door a, provided with a look I) of any style and having a latch-bolt u, and my improved device is designed for use in connection with the door-knobs of such door.

In the drawings, a represents a portion of the edge of a-door having therein an ordinary mortise-lock b. The key-follower Z,

and correcarried by the blade cin the slot e in the spindle d of the knobs, is secured to the end of the blade 0 by the usual swivel connection. The forward end of the carrier-blade c is provided with a cylindrical socket adapted to receive the swivel end I of the spirally-shaped blade I". The guide plates g g at the base of the carrier-blade c fit into their seats g g in the carrier-blade c. The guide-plates g g are preferably held in position by means of screws h h in the semicircular slide-ring 71 partly surrounding the knob-shank i. The

ead k of the spindle dis hollow to receive the key-follower Z and is secured in any desired manner, as by the screws-m m, to the cylinder m, which is provided with sockets containing the ward-pins n n projecting slightly into the keyway y and adapted to work in conjunction with the ward-pins n n, arranged within the lmob-barrel 0. The base-plate t of the outer knob-barrel 0 may be provided with studs 1) p, which enter the wood of the door a, when properly adjusted thereto and prevent the knob-barrel. o from turning. This outer knob may be retained in position by a screw on the inner side of the door in the usual manner.

It will be obvious that the outer knob-section 1' will rotate upon its fixed knob-barrel 0 whenever the u per ends of the ward-pins n n are brought dilsh with the outer circumference of the keyway-cylinder m. The 'knob 0 on the inner side of the door maybe inte alwith or otherwise fixed to its shank i.

heparts of my device bein assembled, its mode of operation is-as fol ows: In the drawing Fi 1 the knob 1' is represented as being locke b the pin 11?, which engages the .keyway-cy'lin er m and fixed knob-barrel 0,

thus preventing the spindle d from o}perat ing upon the latch-b0 t'u, with whic it is connected in the usual manner.

to turn the spin e d and throw the bolt 11., the ward-pin 72? must be raised until its upper end is even with the upper surface of cylmder m. .For thislpurp To unlockthe knob 1, thus ermitting it to be rotated usual manner, and thereb releases the key- Way barrel or cylinder m om the knob-barrel-0, when the knob 1 ma be turned, thus carrying with it the spind e ortio'n d, and

thereby throwing the latcholt u in the 11 serves normally to lock the cylinder m by engaging the c linder m and the barrel 0.. of the knob, which engagement will be released only by the insertion of the ke which is provided with a socket s on its e ge to allow the ward-pin n to drop out of engagement when the key is in pos tion. The advantage of this arrangement is that the false ward-pin n will serve to-destroy any wax or other 1mpression of the lock which may be attempted to be taken. When the key s is withdrawn, the knob 1. becomes locked by the pin 113, as above described, and in order to use the knobs in the usual way the semicircular slide-ringh is pushed forward and forces the key-follower, which I term here the spi-' rall -shapedblade Z into the keyway 3 an operates the ward-pin n in the same manner as the key 8, thus releasing the keywa barrel or cylinder m, when the knobs 0 1* on either side of the door can be turned, and they remain so till the key-i01 lower Z is forced back, either by the semicircular ring if being moved rearward or by the key 8 being inserted in'the keyway y and removed, when the knobs 0 and 1' will become looked, as above explained. V

I prefer to provide on the inner projection of the outer knob 1* two or more screws r 1',

which revolve withthe knob in the annular of constructlon may be used without departing fromthe spirit and scope of my invention. For instance, Imay use at end of the key-follower any other shaped blade, instead of the spiral-shaped, and a correspglnding shapgld key and keyway in the outer ob 0r spln e. I i

7 Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, isr

1. In a device of the character described the combination of a rotatable cylinder hava ing a s irally-shaped ke a and a s irall shape key-follower for ii nlbcking solid c iinder, substantially as shown and described.

2.- In a device of the character described, the combination of a rotatable cylinder, a

spirally-shaped keyway therein a ward-pin same, substantially as shown and described.

4. In a device of the character described, the combination of a rotatable cylinder provided with a spiral keyway, a ward-pin proj ecting therein, a spindle connected with said rotatable cylinder and acarrierprovidedwith a key-follower for unlocking the rotatable cylinder, substantially as shown and described. 5. In a device of the character described, the combination of a door, a lock, knobs situated on each side of the door, one of said knobs being provided with a rotatable cylinder, a spiral keyway-therein, a spindle between said knobs, a carrier supported within said spindle, a key-follower for unlocking the rotatable cylinder, means for moving the said key-follower longitudinally whereby the outer of said knobs is engaged or disengaged and means for moving said s indle rotatively substantially as shown and dhscribed.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 25th day of May, 1906.

JULIAN A. HURDLE. Witnesses:

PAUL M. PELLETREAU, ARTHUR M. MANDER. 

